A chemical ('A?) is used for the preparation of washing soda... | Chemistry | SolveeIt | Solveeit

Today, August 18

Question

A chemical $'A?$ is used for the preparation of washing soda to recover ammonia. When $CO_2$ is bubbled through an aqueous solution of $'A?$ , the solution turns milky. It is used in white washing due to disinfectant nature. What is the chemical formula of $'A'$ ?

A

$Ca(HCO_3)_2$

B

$CaO$

C

$Ca(OH)_2$

D

$CaCO_3$

Answer

$Ca(OH)_2$

Explanation

Solution

$Ca(OH)_2$ is used in Solvay process i.e., preparation of washing soda $(Na_2CO_3 \cdot 10H_2O)$ to recover $NH_3$ . ${2NH4Cl}\,+$ $\underset{\text{$ 'A' $}}{ {Ca(OH)2} \to} {2NH3 + CaCl2 + H2O}$ $\underset{\text{$ 'A' $}}{ {Ca(OH)2}} + {CO2 \to}$ $\underset{\text{Milkincss}}{ {CaCO3 v}} {+ H2O}$ $Ca(OH)_2$ is used in white washing due to its disinfectant nature.